Subject: Re: [linux-audio-dev] Athlon64 .. performance boost ?
From: Jussi Laako (jussi.laako_AT_pp.inet.fi)
Date: Thu Nov 27 2003 - 21:13:01 EET
On Thu, 2003-10-16 at 19:19, Robert Jonsson wrote:
> weapon the compiler can use to optimize code. Athlon64 remedies this by
> doubling the size (32->64) and the amount (8->16) of all integer registers.
> SSE also have double the amount of registers which (i think) benefits
> floating point work (if the compiler supports it).
With Opteron/Athlon64 it's _very_ important to use SSE/3DNow optimized
asm code. There are _major_ speed differences between the code generated
by C/C++ compilers and handwritten assembly code.
For some DSP routines the speed difference seems to be about 10x.
-- Jussi Laako <jussi.laako_AT_pp.inet.fi>
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